Table 1. Feature categories mentioned in user reviews (N=602)^a.

Features	Definition	Values, n (%)
Integration	The ability to connect with external devices.	259 (43)
Tracking	The ability to store data relevant to diabetes management.	194 (32.2)
Data logging	The ability to add contextual information in the app.	86 (14.3)
Notifications	All features related to alarms, alerts, reminders, and tips.	70 (11.6)
User accounts	The ability to log in or out of associated accounts in order to access app functionality.	38 (6.3)
User interface	Any information associated with the user interface.	34 (5.6)
Data sharing	The ability to share static data with an external source.	27 (4.5)
Monitoring	The ability to share dynamic data with an external source.	15 (2.5)
Compatibility	Hardware or software issues between devices.	15 (2.5)
Calculations	The ability to use the app to calculate bolus and other dosage levels.	9 (1.5)
Data privacy	How much control and freedom the user has over where their data are stored and who it is shared with.	8 (1.3)

^aSome reviews mentioned more than 1 feature type.